Hi Ernie --Many thanks for very useful responses!
I have one more, sorry if I'm being a pest.
-- Did you install a router for the comms between the Expedition PC and the Fire? I'm reading that the Fire, at least some versions of it, does not support peer-to-peer WifFi, which, I think, means a router would be required.
There are other good reasons for a router... will probably get one anyway... curious though.
Cheers,
Mark